CN115424898A

CN115424898A - Double-breakpoint relay

Info

Publication number: CN115424898A
Application number: CN202211373239.4A
Authority: CN
Inventors: 覃福铁; 王文俊; 李亮亮
Original assignee: Churod Electronics Co ltd
Current assignee: Churod Electronics Co ltd
Priority date: 2022-11-04
Filing date: 2022-11-04
Publication date: 2022-12-02
Anticipated expiration: 2042-11-04
Also published as: CN115424898B

Abstract

The invention discloses a double-breakpoint relay, which relates to the technical field of relays and specifically comprises the following components: the armature is rotationally connected to the electromagnetic component; the first end of the connecting sheet is provided with a first movable contact and a second movable contact, and the second end of the connecting sheet is provided with a first connecting part connected to the armature; the connecting line of the first connecting part, the first movable contact and the second movable contact forms a first triangular area; one end of the first elastic piece is connected with the armature, and the other end of the first elastic piece is connected with the connecting piece and is positioned in the first triangular area; the first elastic piece applies acting force towards the armature to the connecting piece; after the first movable contact rotates along with the armature and is contacted with the first fixed contact, the connecting piece rotates around a connecting line between the first connecting part and the first movable contact, so that the second movable contact is contacted with the second fixed contact. The double-breakpoint relay disclosed by the invention can solve the technical problem that the contact pressure of two contact pairs on the existing double-breakpoint relay is difficult to meet the requirement on consistency.

Description

Double-breakpoint relay

Technical Field

The invention belongs to the technical field of relays, and particularly relates to a double-breakpoint relay.

Background

The double-breakpoint relay is used for realizing the conduction of a circuit through the contact of two movable contacts and two fixed contacts. The double-breakpoint relay has higher consistency requirement on the contact pressure of two contact pairs (each movable contact and the corresponding fixed contact form a contact pair), and only the consistency of the contact pressure is improved, so that the relay product can be ensured to have longer electrical service life and good low-temperature rise performance.

The double-breakpoint relay in the current market generally arranges two moving contacts on an elastic sheet, and the contact pressure of the double-breakpoint relay is provided by the bending deformation of the elastic sheet, so that the position deviation of two contact pairs is eliminated through the bending deformation, and the two contact pairs can be ensured to be contacted simultaneously. The disadvantages of this technique are: when one contact pair is in contact with the other contact pair before being in contact, the elastic sheet needs to continue to move and bend until the other contact pair is in contact with the other contact pair, and the contact pressure of the contact pair in the first contact is obviously greater than that of the contact pair in the second contact in the process, so that the requirement of the double-breakpoint relay on the consistency of the contact pressure is difficult to meet, and the adverse effect on the performance of a relay product is generated.

Disclosure of Invention

The invention aims to provide a double-breakpoint relay, and aims to solve the technical problem that the contact pressure of two contact pairs on the existing double-breakpoint relay is difficult to meet the requirement on consistency.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a dual breakpoint relay, comprising:

an armature rotatably connected to the electromagnetic assembly;

the first end of the connecting piece is provided with a first movable contact and a second movable contact at intervals, the second end of the connecting piece is provided with a first connecting part, the second end of the connecting piece and the first end of the connecting piece are arranged along the direction far away from the rotating center line of the armature, and the first connecting part is connected to the armature; a connecting line among the first connecting part, the first movable contact and the second movable contact is encircled to form a first triangular area;

one end of the first elastic piece is connected with the armature, and the other end of the first elastic piece is connected with the connecting piece and is positioned in the first triangular area; the first elastic piece is used for applying elastic acting force towards the armature to the connecting piece;

when the first movable contact contacts with the first fixed contact along with the rotation of the armature, the connecting piece rotates by taking a connecting line between the first connecting part and the first movable contact as an axis until the second movable contact contacts with the second fixed contact.

Further, the armature has a first projection, which abuts against the first connection.

Further, the armature has a second lobe and a third lobe; wherein:

the second lug boss and the third lug boss are used for being abutted against the middle part of the connecting piece; the connecting lines among the first protruding part, the second protruding part and the third protruding part enclose to form a second triangular area, and one end of the first elastic part is located in the second triangular area.

Further, the first convex part is in a spherical crown shape.

Further, the second convex part is in a spherical crown shape.

Further, the third convex part is in a spherical crown shape.

Furthermore, the first triangular region is an isosceles triangle with the first connecting portion as a vertex and a connecting line between the first movable contact and the second movable contact as a base line, the connecting line between the first movable contact and the second movable contact is parallel to the rotation axial direction of the armature, and the connecting portion between the other end of the first elastic element and the connecting piece is located on a vertex angle bisector of the first triangular region.

Furthermore, the second triangular region is an isosceles triangle with the first convex part as a vertex and a connecting line between the second convex part and the third convex part as a base line, the connecting line between the second convex part and the third convex part is parallel to the rotation axial direction of the armature, and a connecting part between one end of the first elastic part and the armature is located on a vertex angle bisector of the second triangular region.

Further, the armature has a limit groove; the second end of the connecting sheet is provided with a bending part, and the bending part is buckled in the limiting groove.

Furthermore, a waist-shaped through hole is formed in the connecting piece, the armature is provided with a boss connecting seat, the boss connecting seat penetrates through the waist-shaped through hole, one end of the first elastic piece is connected to the boss connecting seat, and the other end of the first elastic piece abuts against one side face, back to the armature, of the connecting piece.

Further, the electromagnetic assembly includes a coil body, an iron core, and a yoke; wherein:

the iron core is arranged towards the armature, the coil body is wound on the iron core, the yoke is connected to the iron core, and the armature is rotatably connected to the yoke;

the coil body forms an induction magnetic field after being electrified so as to attract the armature iron to rotate relative to the yoke iron, and therefore the first movable contact and the second movable contact are driven to move along the direction close to the first fixed contact and the second fixed contact.

Further, the double-breakpoint relay further comprises a coil frame and a second elastic piece; wherein:

the iron core is connected to the coil rack, and the yoke is connected to the coil rack; one end of the second elastic piece is connected to the yoke, and the other end of the second elastic piece is connected to the armature; the rotation center line of the armature is positioned between the other end of the second elastic piece and the connecting piece;

the second elastic piece is used for applying elastic acting force to the armature so as to drive the armature to rotate relative to the yoke, and therefore the first movable contact and the second movable contact are driven to move along the direction far away from the first fixed contact and the second fixed contact.

Compared with the prior art, the invention has the beneficial effects that:

the invention provides a double-breakpoint relay, which adopts a three-point stress stabilization principle, utilizes a rigid connecting piece to replace a bendable elastic piece in the prior art, when the same-plane degree of contacts does not reach an ideal state (namely a first movable contact and a second movable contact cannot be respectively contacted with a first fixed contact and a second fixed contact at the same time), the contacted fixed contact and the corresponding part of an armature connected with a first connecting part respectively apply an acting force to the connecting piece in a direction opposite to the armature, a first elastic piece applies an acting force to the connecting piece in a direction towards the armature, the acting point of the first elastic piece is positioned on one side of a connecting line between the first connecting part and the contacted movable contact, which is close to the non-contacted movable contact (namely positioned in a first triangular area), at the moment, the connecting sheet is unbalanced in stress, the connecting sheet rotates relative to the armature by taking a connecting line between the first connecting part and the movable contact which is contacted with the first connecting part as a shaft until the movable contact which is not contacted with the movable contact is contacted with the static contact which is not contacted with the movable contact, so that the contact pressure of two contact pairs (each movable contact and the corresponding static contact form a contact pair) tends to be more balanced compared with the traditional mode, the effect of automatically distributing the contact pressure of the two contact pairs is achieved in a simpler and lower-cost mode, the two contact pairs can better meet the requirement of the double-breakpoint relay on the consistency of the contact pressure, the risk of generating adverse effects on the performance of the double-breakpoint relay product is reduced, the use reliability of the double-breakpoint relay product is improved, and the service life of the double-breakpoint relay product is prolonged; in addition, because the thickness of connection piece is bigger than traditional bendable shell fragment, it is great electric current as circular telegram conductor accessible to the current load index scope of this double break point relay product has been improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a first perspective view of an overall structure of an embodiment of a double-breakpoint relay according to the present invention;

fig. 2 is a second view schematic diagram of the overall structure of an embodiment of the double-break relay of the present invention (the double-break relay is in a disconnected state);

fig. 3 is a second view schematic diagram of the overall structure of the double-breakpoint relay according to the embodiment of the invention (the double-breakpoint relay is in a closed state);

fig. 4 is a first partial structural schematic diagram of an embodiment of a double-breakpoint relay of the invention;

FIG. 5 is a second partial structural diagram of an embodiment of a double break relay according to the present invention;

fig. 6 is a third partial structural schematic diagram of an embodiment of a double break relay according to the present invention;

fig. 7 is a three-point force diagram of a double-break relay according to an embodiment of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name(s)
				1	Armature iron	13	First convex part
2	Connecting sheet	14	Second convex part
				3	A first elastic member	15	Third raised part
4	Main terminal	16	A second triangular region
				5	Coil body	21	First movable contact
6	Iron core	22	Second moving contact
				7	Yoke iron	23	Bending part
8	Coil rack	24	Waist-shaped through hole
				9	Second elastic member	25	First triangular region
11	Boss connecting seat	41	First stationary contact
				12	Limiting groove	81	Coil terminal

The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if the present invention relates to directional indications (such as up, down, left, right, front, back, 8230; \8230;), the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture, and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" and/or "appears throughout, the meaning includes three parallel schemes, for example," A and/or B "includes scheme A, or scheme B, or a scheme satisfying both schemes A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1 to 7, an embodiment of the present invention provides a dual-breakpoint relay, including:

the armature 1 is rotatably connected to the electromagnetic component;

a connecting piece 2, a first end of the connecting piece 2 is provided with a first movable contact 21 and a second movable contact 22 at intervals, a second end of the connecting piece 2 is provided with a first connecting part (not shown in the figure), the second end of the connecting piece 2 and the first end of the connecting piece 2 are arranged along the direction far away from the rotation center line of the armature 1, and the first connecting part is connected on the armature 1; the connecting line among the first connecting part, the first movable contact 21 and the second movable contact 22 is enclosed to form a first triangular area 25;

one end of the first elastic part 3 is connected with the armature 1, and the other end of the first elastic part 3 is connected with the connecting piece 2 and is positioned in the first triangular area 25; the first elastic member 3 is for applying an elastic force to the connection piece 2 toward the armature 1;

when the first movable contact 21 contacts the first stationary contact 41 with the rotation of the armature 1, the connecting piece 2 rotates about a connecting line between the first connecting portion and the first movable contact 21 until the second movable contact 22 contacts a second stationary contact (not shown).

In this embodiment, the double-breakpoint relay may specifically be a double-breakpoint clapper type electromagnetic relay, where the electromagnetic component includes devices such as a coil winding and an iron core that can generate an induced magnetic field through a magnetic effect of current, and the generated induced magnetic field can form an adsorption effect on the armature 1 to drive the armature 1 to rotate, so that the first movable contact 21 and the second movable contact 22 on the armature 1 are respectively in contact with the first stationary contact 41 and the second stationary contact on the main terminal 4, thereby implementing conduction of the corresponding loop.

The connecting piece 2 has conductivity, the thickness of the connecting piece is preferably 1 to 3mm, and the shape and the size of the connecting piece 2 can be kept unchanged after the connecting piece 2 is acted by force in motion (namely, when the movable contact is in contact with the static contact), namely, the connecting piece 2 is a rigid body. Illustratively, a first end of the connecting piece 2, which is far away from the rotation center line of the armature 1, is provided with a first movable contact 21 and a second movable contact 22 at intervals; the first connecting part is a corresponding structure which is arranged at the second end of the connecting piece 2 close to the rotation center line of the armature 1 and is used for movably connecting with the matching part of the armature 1, and it can be understood that the connecting piece 2 can keep contact with the armature 1 under the elastic acting force of the first elastic piece 3 and has a certain degree of freedom relative to the armature 1 (at least, the connecting piece 2 has a rotation degree of freedom which can make the connecting piece 2 rotate by taking the connecting line between the first connecting part and the first movable contact 21 as a shaft and a rotation degree of freedom which can make the connecting piece 2 rotate by taking the connecting line between the first connecting part and the second movable contact 22 as a shaft); specifically, the first connection portion and the matching portion on the armature 1 for connecting with the first connection portion may have a convex structure, and the other may have a planar structure or a concave structure matching with the convex structure; of course, the corresponding structural form of the first connection portion is not limited to this, and only the effect of limiting the degree of freedom is achieved, which is not listed and described herein.

The first elastic member 3 may be a spring, an elastic rubber member, or the like. One end of the first elastic member 3 is connected to the armature 1, specifically, the first elastic member 3 may be directly connected to the main body of the armature 1, or the first elastic member 3 may be indirectly connected to the armature 1 through a switching structure (the switching structure may be fixed to the main body of the armature 1 through integral molding, pressing, screwing, riveting, welding, etc.), and only the effect of applying an elastic acting force (which may be a pulling force or a pushing force) toward the armature 1 to the connecting piece 2 and causing the connecting piece 2 to move toward the armature 1 needs to be finally achieved, which is not limited herein. When the first elastic element 3 is located in the first triangular region 25 (refer to the triangular regions with points a, D and E as vertexes shown in fig. 1 and 7), along with the rotation of the armature 1, when the first movable contact 21 is in contact with the first fixed contact 41 and the second movable contact 22 is not in contact with the second fixed contact, the connecting piece 2 is applied with an acting force in a direction away from the armature 1 by the first fixed contact 41 and the corresponding part of the armature 1 connected with the first connecting part, and the connecting piece 2 is applied with an acting force in a direction towards the armature 1 by the first elastic element 3, and the point of application of the first elastic element 3 is located on a side of a connecting line between the first connecting part and the first movable contact 21 close to the second movable contact 22 (i.e. located in the first triangular region 25), so that the connecting piece 2 is unbalanced under force, the connecting piece 2 rotates relative to the armature 1 by taking a connecting line between the first connecting part and the first movable contact 21 as an axis (the rotating direction can refer to the arrow direction of fig. 7) until the second movable contact 22 is contacted with the second stationary contact, so that the contact pressure of two contact pairs (each movable contact and the corresponding stationary contact form a contact pair) tends to be more balanced compared with the traditional mode, the effect of automatically distributing the contact pressure of the two contact pairs is achieved in a simpler and lower-cost mode, the two contact pairs can better meet the requirement of the double-breakpoint relay on the consistency of the contact pressure, the risk of adverse effect on the performance of the double-breakpoint relay product is reduced, the use reliability of the double-breakpoint relay product is improved, and the service life of the double-breakpoint relay product is prolonged.

It is understood that the first movable contact 21 described above may refer to any one of the two movable contacts, and does not refer exclusively to the movable contact located on the left side of the connecting piece 2 shown in fig. 1. If the moving contact distribution shown in fig. 1 is explained, similarly, when the second moving contact 22 is in contact with the second fixed contact and the first moving contact 21 is not yet in contact with the first fixed contact 41, the second fixed contact and the corresponding portion of the armature 1 connected to the first connecting portion apply an acting force to the connecting piece 2 in a direction away from the armature 1, and the first elastic member 3 applies an acting force to the connecting piece 2 in a direction toward the armature 1, and the point of application of the first elastic member 3 is located on a side of the connecting line between the first connecting portion and the second moving contact 22 close to the first moving contact 21 (i.e. located in the first triangular region 25), at this time, the connecting piece 2 is unbalanced in force, and the connecting piece 2 will rotate relative to the armature 1 with the connecting line between the first connecting portion and the second moving contact 22 as an axis (the rotation direction can refer to the arrow of fig. 7) until the first moving contact 21 is in contact with the first fixed contact 41.

In addition, because the connecting sheet 2 is a rigid body, the thickness of the connecting sheet is larger than that of a traditional bendable elastic sheet, and the connecting sheet 2 can pass larger current as an electrified conductor, so that the current load index range of the double-breakpoint relay product is improved.

Therefore, the double-breakpoint relay provided by the embodiment adopts the three-point stress stabilization principle, utilizes the connecting sheet 2 to replace the bendable elastic sheet in the prior art, when the contact coplanarity does not reach the ideal state (i.e. the first moving contact 21 and the second moving contact 22 can not be contacted with the first fixed contact 41 and the second fixed contact at the same time), the contacted fixed contact and the corresponding part of the armature 1 connected with the first connecting part respectively apply acting force to the connecting piece 2 in the direction opposite to the armature 1, the first elastic element 3 applies an acting force to the connecting piece 2 in the direction towards the armature 1, and the point of application of the first elastic element 3 is located on the side of the connecting line between the first connecting part and the contacted movable contact close to the non-contacted movable contact (i.e. located in the first triangular region 25), at this time, the connecting piece 2 is unbalanced in stress, the connecting piece 2 rotates relative to the armature 1 with the connecting line between the first connecting part and the contacted movable contact as an axis (the rotating direction can refer to the arrow direction of fig. 7) until the non-contacted movable contact is contacted with the non-contacted fixed contact, the contact pressure of two contact pairs (each movable contact and the corresponding fixed contact form a contact pair) can be more balanced compared with the traditional mode, the effect of automatically distributing the contact pressure of two contact pairs is achieved in a simpler and lower-cost way, so that the two contact pairs can better meet the consistency requirement of the double-breakpoint relay on the contact pressure, therefore, the risk of generating adverse effect on the performance of the double-breakpoint relay product is reduced, the use reliability of the double-breakpoint relay product is improved, and the service life of the double-breakpoint relay product is prolonged; in addition, because the thickness of connection piece 2 is bigger than traditional bendable shell fragment, it is great electric current as circular telegram conductor accessible to the current load index scope of this double break point relay product has been improved.

Alternatively, with reference to fig. 1 to 7, the armature 1 has a first projection 13, the first projection 13 abutting the first connection.

Illustratively, the first connection portion may be a planar structure that mates with the first protruding portion 13. By arranging the first protruding part 13, a certain preset distance (namely the height of the first protruding part 13) can be reserved between the main body part of the connecting piece 2 and the main body part of the armature 1, the contact area between the main body part of the connecting piece 2 and the main body part of the armature 1 is reduced, the rotation freedom degree of the connecting piece 2 when rotating by taking a connecting line between the first connecting part and any movable contact as an axis is ensured, and the subsequent action of rotating the connecting piece 2 by taking the connecting line between the first connecting part and the contacted movable contact as the axis can be smoothly finished.

Alternatively, with reference to fig. 1 to 7, the armature 1 has a second boss 14 and a third boss 15; wherein:

the second convex part 14 and the third convex part 15 are used for abutting against the middle part of the connecting sheet 2; the connecting lines among the first protruding portion 13, the second protruding portion 14, and the third protruding portion 15 enclose a second triangular region 16, and one end of the first elastic element 3 is located in the second triangular region 16 (see the triangular region with points a, B, and C as vertexes shown in fig. 7).

In the case that the first protruding portion 13 is provided on the armature 1, by providing the second protruding portion 14 and the third protruding portion 15, according to the three-point force stabilization principle, it is ensured that the connecting piece 2 is stably abutted against the armature 1 under the elastic force of the first elastic member 3 (the point of application of the elastic force is located in the second triangular region 16) while a certain preset distance is provided between the main body portion of the connecting piece 2 and the main body portion of the armature 1.

Subsequently, when the first movable contact 21 contacts the first fixed contact 41 and the second movable contact 22 is not contacted with the second fixed contact yet, along with the continuous rotation of the armature 1, the second protruding portion 14 (the second protruding portion 14 is closer to the first movable contact 21 than the third protruding portion 15) will be separated from the connecting piece 2, and the connecting piece 2 will rotate relative to the armature 1 with the connecting line between the first connecting portion and the first movable contact 21 as an axis (the rotation direction can refer to the arrow direction of fig. 7), until the connecting piece 2 rotates until the second movable contact 22 contacts the second fixed contact and the third protruding portion 15 separates from the connecting piece 2, and at this time, the first fixed contact 41, the first protruding portion 13, and the second fixed contact respectively apply an acting force to the connecting piece 2 in a direction opposite to the armature 1, the first elastic piece 3 applies an acting force to the connecting piece 2 in a direction toward the armature 1, and the connecting piece 2 is in a new three-point force-stable state and realizes loop conduction.

The same applies to the case where the second movable contact 22 is in contact with the second stationary contact and the first movable contact 21 is not yet in contact with the first stationary contact 41 during the rotation of the armature 1, and details thereof are not repeated here.

Alternatively, referring to fig. 6, the first convex portion 13 has a spherical crown shape.

Alternatively, referring to fig. 6, the second boss 14 is in the shape of a spherical cap.

Alternatively, referring to fig. 6, the third boss 15 has a spherical crown shape.

The first protruding portion 13, the second protruding portion 14 and the third protruding portion 15 are arranged in a spherical crown shape, when the first connecting portion is of a planar structure as shown in the figure, it can be guaranteed that the contact between the connecting piece 2 and the first protruding portion 13, the second protruding portion 14 and the third protruding portion 15 is point contact, the point contact has certain aligning and deviation rectifying functions, and it can be guaranteed that the connecting piece 2 can be stably abutted to the armature 1 under the elastic acting force of the first elastic piece 3 under the condition that the heights of the first protruding portion 13, the second protruding portion 14 and the third protruding portion 15 are not consistent; meanwhile, in the process that the subsequent connecting piece 2 rotates relative to the armature 1 by taking a connecting line between the first connecting part and the contacted movable contact as an axis, the spherical crown structure can enable the connecting piece 2 to smoothly rotate on the surfaces of the first bulge part 13, the second bulge part 14 and the third bulge part 15, so that the phenomenon of clamping can be avoided, and the smooth completion of the rotating action of the connecting piece 2 is ensured.

Alternatively, referring to fig. 1 to 7, the first triangular region 25 is an isosceles triangle with the first connection portion as a vertex and a connecting line between the first movable contact 21 and the second movable contact 22 as a base line, the connecting line between the first movable contact 21 and the second movable contact 22 is parallel to the rotation axis direction of the armature 1, and the connection portion between the other end of the first elastic member 3 and the connecting piece 2 is located on a vertex angle bisector of the first triangular region.

Alternatively, referring to fig. 1 to 7, the second triangular region 16 is an isosceles triangle with the first convex portion 13 as a vertex and a connecting line between the second convex portion 14 and the third convex portion 15 as a base line, the connecting line between the second convex portion 14 and the third convex portion 15 is parallel to the rotation axis direction of the armature 1, and a connecting portion between one end of the first elastic element 3 and the armature 1 is located on a bisector of a vertex angle of the second triangular region.

As shown in fig. 7, when the first connection portion, the first movable contact 21 and the second movable contact 22 form an isosceles triangle (i.e. a triangular area with points a, D and E as vertexes), and the connection portion between the other end of the first elastic element 3 and the connecting piece 2 is located on the angle bisector of the vertex angle of the isosceles triangle, the stress conditions of the first movable contact 21 and the second movable contact 22 when contacting with the first fixed contact 41 and the second fixed contact respectively tend to be equal, thereby further improving the balance of the distribution of the upper contact pressure by the two contacts. As shown in fig. 7, when the first protruding portion 13, the second protruding portion 14 and the third protruding portion 15 form an isosceles triangle (i.e. a triangle area with points a, B and C as vertexes), and the connection portion between one end of the first elastic element 3 and the armature 1 is located on the angle bisector of the vertex angle of the isosceles triangle, the stress conditions of the side of the connecting piece 2 located on the second protruding portion 14 and the side located on the third protruding portion 15 at normal state and when the connecting piece 2 rotates relative to the armature 1 tend to be equal, so as to further improve the balance of the distribution of the contact pressure on the two contact pairs. By the arrangement, the contact pressures of the two contact pairs can be kept consistent.

Alternatively, with reference to fig. 1 to 7, the armature 1 has a limit recess 12; the second end of the connecting sheet 2 is provided with a bending part 23, and the bending part 23 is buckled in the limiting groove 12.

The limiting grooves 12 can be symmetrically arranged at two positions as shown in fig. 6; the bending portion 23 can be bent downward to be buckled in the limiting groove 12 from top to bottom. Through the quick buckling and matching of the bending portion 23 and the limiting groove 12, the translational degree of freedom of the connecting piece 2 along the surface of the armature 1 can be conveniently limited (taking fig. 1 as an example, namely the translational degree of freedom of the connecting piece 2 on the x and y axes is limited), and meanwhile, the rotation of the connecting piece 2 relative to the armature 1 in the subsequent pressure distribution action process is not influenced, so that the connecting piece 2 is prevented from displacing along the surface of the armature 1 in the subsequent action process to cause the distribution of the two contact pressures to the upper contact pressure to generate deviation.

Optionally, referring to fig. 1 to 7, the connecting piece 2 is provided with a waist-shaped through hole 24, the armature 1 is provided with a boss connecting seat 11, the boss connecting seat 11 is inserted into the waist-shaped through hole 24, one end of the first elastic element 3 is connected to the boss connecting seat 11, and the other end of the first elastic element 3 abuts against a side surface of the connecting piece 2 facing away from the armature 1.

The boss connecting seat 11 can be in a stepped cylinder shape, and the first elastic piece 3 is arranged on the small-diameter part of the boss connecting seat 11 and abuts against the end face of the large-diameter part of the boss connecting seat 11; the first elastic element 3 is in a compressed state and can push the connecting piece 2 to abut against the armature 1. By providing the waist-shaped through hole 24, friction can be avoided under the condition that the boss connecting seat 11 passes through.

Alternatively, referring to fig. 1 to 7, the electromagnetic assembly includes a coil body 5, an iron core 6, and a yoke 7; wherein:

the iron core 6 is arranged towards the armature 1, the coil body 5 is wound on the iron core 6, the yoke 7 is connected to the iron core 6, and the armature 1 is rotatably connected to the yoke 7;

the coil body 5 forms an induced magnetic field after being energized to attract the armature 1 to rotate relative to the yoke 7, so as to drive the first movable contact 21 and the second movable contact 22 to move along the direction close to the first fixed contact 41 and the second fixed contact.

The yoke 7 can be used for sealing the magnetic force lines of the induction magnetic field inside, thereby improving the efficiency of the electromagnet and enhancing the attraction force to the armature 1. The coil body 5 may be connected with a coil terminal 81 for supplying current to the coil body 5 by an external power supply.

Optionally, referring to fig. 1 to 7, the double break relay further includes a bobbin 8 and a second elastic piece 9; wherein:

the iron core 6 is connected on the coil frame 8, and the yoke 7 is connected on the coil frame 8; one end of the second elastic element 9 is connected to the yoke 7, and the other end of the second elastic element 9 is connected to the armature 1; the rotation center line of the armature iron 1 is positioned between the other end of the second elastic piece 9 and the connecting piece 2;

the second elastic element 9 is used for applying an elastic acting force to the armature 1 to drive the armature 1 to rotate relative to the yoke 7, so as to drive the first movable contact 21 and the second movable contact 22 to move in a direction away from the first fixed contact 41 and the second fixed contact.

Illustratively, the coil frame 8 is horizontally arranged, and the iron core 6 and the coil body 5 are vertically arranged on the coil frame 8; the yoke 7 is L-shaped, the transverse portion of the yoke 7 is connected to the coil former 8, and the armature 1 is mounted on the vertical portion of the yoke 7 such that the main portion of the armature 1 is above the core 6. The second elastic member 9 may be a spring in a stretched state, and as shown in fig. 1 to 3, an upper end of the second elastic member 9 may be hooked on the hook portion of the armature 1, and a lower end of the second elastic member 9 may be hooked on the hook portion of the yoke 7. When the coil body 5 is electrified to generate an induction magnetic field, the direction of the elastic acting force of the second elastic part 9 is opposite to the direction of the attraction force of the induction magnetic field to the armature 1, so that a force counteracting effect can be generated, the armature 1 slowly rotates along the direction close to the iron core 6, the corresponding contact pair can be ensured to be stably contacted, and the impact damage of the corresponding device caused by collision due to the fact that the armature 1 rotates too fast can be avoided; when the coil body 5 stops being electrified, the armature 1 can be driven to rotate quickly along the direction far away from the iron core 6 under the elastic acting force of the second elastic piece 9, so that the corresponding contact pair is guaranteed to be disconnected in time.

It should be noted that other contents of the double-breakpoint relay disclosed in the present invention can be referred to in the prior art, and are not described herein again.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A double-breakpoint relay, comprising:

an armature rotatably connected to the electromagnetic assembly;

when the first movable contact is contacted with the first fixed contact along with the rotation of the armature, the connecting piece rotates by taking a connecting line between the first connecting part and the first movable contact as a shaft until the second movable contact is contacted with the second fixed contact.

2. The double breakpoint relay according to claim 1, wherein the armature has a first protrusion, the first protrusion abutting the first connection portion.

3. The double break relay according to claim 2, wherein the armature has a second lobe and a third lobe; wherein:

the second lug boss and the third lug boss are used for being abutted against the middle part of the connecting sheet; the connecting lines among the first protruding part, the second protruding part and the third protruding part enclose to form a second triangular area, and one end of the first elastic part is located in the second triangular area.

4. A double breakpoint relay according to claim 3, wherein the first raised portion is in the shape of a spherical crown;

and/or the second bulge is in a spherical crown shape;

and/or the third bulge is in a spherical crown shape.

5. The double-breakpoint relay according to claim 1, wherein the first triangular region is an isosceles triangle having the first connection portion as a vertex and a connecting line between the first movable contact and the second movable contact as a base line, the connecting line between the first movable contact and the second movable contact is parallel to a rotation axis direction of the armature, and the connection portion between the other end of the first elastic member and the connection piece is located on a vertex angle bisector of the first triangular region.

6. The double-breakpoint relay according to claim 3, wherein the second triangular region is an isosceles triangle with the first protruding portion as a vertex and a connecting line between the second protruding portion and the third protruding portion as a base line, the connecting line between the second protruding portion and the third protruding portion is parallel to the rotation axial direction of the armature, and a connecting portion between one end of the first elastic member and the armature is located on a vertex angle bisector of the second triangular region.

7. The double breakpoint relay according to claim 1, wherein the armature has a limit recess; the second end of the connecting sheet is provided with a bending part, and the bending part is buckled in the limiting groove.

8. The double-breakpoint relay according to claim 1, wherein the connecting piece is provided with a waist-shaped through hole, the armature is provided with a boss connecting seat, the boss connecting seat penetrates through the waist-shaped through hole, one end of the first elastic member is connected to the boss connecting seat, and the other end of the first elastic member abuts against a side surface of the connecting piece, which faces away from the armature.

9. The double breakpoint relay of claim 1, wherein the electromagnetic assembly includes a coil body, an iron core, and a yoke; wherein:

10. The double breakpoint relay according to claim 9, further comprising a bobbin and a second elastic member; wherein:

the iron core is connected to the coil frame, and the yoke iron is connected to the coil frame; one end of the second elastic piece is connected to the yoke, and the other end of the second elastic piece is connected to the armature; the rotation center line of the armature is positioned between the other end of the second elastic piece and the connecting piece;